This is How Easy it is to Make Changes to DrRacket

DrRacket is open-source (LGPL) editor for Racket. Sometimes you want to make changes to it. For example today I wanted to enable online compilation on single-core machines. Here is how easy it is to do it:

Assuming that DrRacket is already installed. This is a normal installation using the installer; you do not typically have to check out the Git repo to make changes.

Asked Robby how to make the change. Robby is super everybody knows that, he explained the fix. The check for enabling the feature is in module-language.rkt. Here are the steps